The study was conducted in 1998–2001 at the Lipki Experiment Station by Stargard Szczecinski. Field experiments consisted of 4-year tests, which were the year of planting and three years of full use. The design was split-plot, 4 replications, plot size 12 m2. Two factors were considered: I – Festuca rubra cultivar Reda and Nimba; II – nitrogen dose (kg ha-1): 0, 60, 90, 120. The seed yield depended on the cultivar, nitrogen fertization and year of harvest. The yield of seeds in the first and second years which was given by Nimba cultivar was higher by 37.6% and 23.7% respectively, but in the third year its yields were lower by 18.8% in comparison with Reda cultivar. The applied nitrogen fertilization increased the seed yield of the tested Festuca rubra cultivars.